Patent Assignment
Reel/Frame 007922/0741
Assignment of Assignor's Interest
Recorded: 1996-03-18
Pages: 3
Assignor
MITCHELL, WILLIAMS K.
Executed: 1996-03-15
Assignee
COMPUTALOG RESEARCH, INC.
7449 WINSCOTT ROAD, FORTH WORTH, TEXAS, 76126
Covered Property
(1)
Method and System for Skin Effect Correction in a Multiple Transmit Frequency Induction Logging System
Patent:
5,698,982 →
Application:
08/617,418 →
Related Assignments
(6)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Jul 1, 2005
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017275/0188 →
Change of Name
Aug 3, 2005
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
To: PRECISION ENERGY SERVICES, LTD.
Reel/Frame 016345/0078 →
Merger
Sep 19, 2005
From: COMPUTALOG RESEARCH, INC.
To: COMPUTALOG USA, INC.
Reel/Frame 016814/0219 →
Change of Name
Feb 7, 2006
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017230/0980 →
Assignment of Assignor's Interest
Apr 21, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017507/0031 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →